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US 6,604,417 B1Granted
Flow sensor and strainer integrated flowmeter
AssigneeMitsui Mining & Smelting Co., Ltd.
InventorsAtsushi Koike, Kiyoshi Yamagishi, Kenichi Hiraizumi, Takayuki Takahata
Life of this patent
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Abstract
A strainer integrated flowmeter 210 is constituted by a strainer section 203 provided with a housing 202 having a flow passage 207 formed therein, a filter member 209 and a filter member insertion cylinder 210; and a flowmeter section 204 provided with a housing 202 having a flow passage 208 formed therein and a flow rate sensor 226. The housings 202 of both the strainer section 203 and flowmeter section 204 are integrated, and the flowmeter section 204 is disposed at downstream side. A vent hole 215 is formed in the housing 202 so as to be in communication with the flow passage 207.
Claims28
A strainer integrated flowmeter comprising:
- a strainer section provided with a housing having a flow passage formed therein, a filter member and a filter member insertion cylinder;
- and
- a flowmeter section provided with a housing having a flow passage formed therein and a flow rate sensor,
- wherein said housing for the strainer section and said housing of the flowmeter section are integrated, and said flowmeter section is disposed downstream said strainer section,
- wherein said flow rate sensor comprises a flow rate detector having a heating element and a temperature sensing element disposed so as to be affected by the effect of the heating of said heating element;
- a fin plate through which heat is transferred to or from a fluid;
- and an output terminal for outputting a voltage value corresponding to a flow rate of the fluid, said flow rate detector being fixed to the fin plate at a position outside the flow passage, and, said flow rate detector, a portion of said fin plate to which said flow rate detector is fixed and a portion of said output terminal are sealed with molding, and
- wherein said housing of the flowmeter section has a sensor insertion hole communicating with the flow passage, and said molding of the flow rate sensor is inserted into said sensor insertion hole so that another portion of said fin plate extending from said molding is located at an inside of the flow passage.
5 more elements
A flow rate sensor comprising:
- a casing;
- a flow rate detector having a heating function and temperature sensing function;
- a fluid-flowing pipe line for a fluid to be detected, the pipe line being formed through the casing;
- and
- a flow rate detecting heat transfer member disposed so as to be affected by a heat generated in said flow rate detector and extend into the inside of said pipe line, said flow rate detector being disposed outside of the pipeline, wherein temperature sensing which is affected by a heat absorption effect of the fluid due to the heat through said flow rate detecting heat transfer member is executed in said flow rate detector, and a flow rate of said fluid in said pipe line is detected on the basis of the result of the temperature sensing,
- wherein said pipe line has a fluid inflow side portion, a fluid outflow side portion and a center portion positioned between said fluid inflow side portion and fluid outflow side portion, said flow rate detecting heat transfer member extends into the inside of said pipe line at said center portion, and an inner diameter of said center portion is smaller than that of said fluid inflow side portion,
- wherein said flow rate detector and a portion of said flow rate detecting heat transfer member to which said flow rate detector is thermally connected are sealed with a base portion, and
- wherein said casing has a retaining portion, and said base portion is retained within said retaining portion so that another portion of said flow rate detecting heat transfer member extending from said base portion is located at the inside of the pipe line at said center portion.
5 more elements
A flow rate sensor comprising:
- a casing;
- a flow rate detector having a heating function and temperature sensing function;
- a fluid-flowing pipe line for a fluid to be detected, the pipe line being formed through the casing;
- and
- a flow rate detecting heat transfer member disposed so as to be affected by a heat generated in said flow rate detector and extend into the inside of said pipe line, said flow rate detector being disposed outside of the pipeline, wherein temperature sensing which is affected by a heat absorption effect of the fluid due to the heat through said flow rate detecting heat transfer member is executed in said flow rate detector, and a flow rate of said fluid in said pipe line is detected on the basis of result of the temperature sensing,
- wherein said flow rate detector and a portion of said flow rate detecting heat transfer member to which said flow rate detector is thermally connected are sealed with a base portion, said casing has a retaining portion, said base portion is retained within said retaining portion, and, another portion of said flow rate detecting heat transfer member extending from said base portion is exposed to an inside of said pipe line only at a central area located from a center line of said pipe line to a radial position of 80% or less of a radial interval between the center line and an inner surface of said pipe line.
3 more elements
Dependencies are inferred from the claim text.